55789887 has 8 divisors (see below), whose sum is σ = 74954880. Its totient is φ = 36909080.

The previous prime is 55789873. The next prime is 55789891. The reversal of 55789887 is 78898755.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55789887 is a prime.

It is a super-2 number, since 2×55789887² = 6225022982945538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55789897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70587 + ... + 71372.

It is an arithmetic number, because the mean of its divisors is an integer number (9369360).

Almost surely, 2^55789887 is an apocalyptic number.

55789887 is a deficient number, since it is larger than the sum of its proper divisors (19164993).

55789887 is a wasteful number, since it uses less digits than its factorization.

55789887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142093.

The product of its digits is 5644800, while the sum is 57.

The square root of 55789887 is about 7469.2628150307. The cubic root of 55789887 is about 382.1071467390.

The spelling of 55789887 in words is "fifty-five million, seven hundred eighty-nine thousand, eight hundred eighty-seven".